Rondas, funções e porque é que um stack muda Siege
A Siege match is up to nine rounds of five against five, and each round is lost to information more often than to aim. A drone kept alive, a callout on a rotate, a trade taken at the right time. That is why Rainbow Six Siege boosting orders are quoted by rank rather than by wins: the booster plays the rounds, you name where the account should finish.
If you want those rounds on your own hands, teammates per match join your stack and cover the role your group is missing, and every rank point is one you played for.
Both routes use the escrow described in the Eloboost24 buying guide.